/*
 * Copyright 2006-2018 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * MZmine 2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with MZmine 2; if not,
 * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

package net.sf.mzmine.main;

import net.sf.mzmine.datamodel.RawDataFile;
import net.sf.mzmine.taskcontrol.Task;
import net.sf.mzmine.taskcontrol.TaskStatus;
import net.sf.mzmine.taskcontrol.impl.WrappedTask;

/**
 * Shutdown hook - invoked on JRE shutdown. This method saves current configuration to XML and
 * closes (and removes) all opened temporary files.
 */
class ShutDownHook extends Thread {

  public void start() {

    // Cancel all running tasks - this is important because tasks can spawn
    // additional processes (such as ThermoRawDump.exe on Windows) and these
    // will block the shutdown of the JVM. If we cancel the tasks, the
    // processes will be killed immediately.
    for (WrappedTask wt : MZmineCore.getTaskController().getTaskQueue().getQueueSnapshot()) {
      Task t = wt.getActualTask();
      if ((t.getStatus() == TaskStatus.WAITING) || (t.getStatus() == TaskStatus.PROCESSING)) {
        t.cancel();
      }
    }

    // Save configuration
    try {
      MZmineCore.getConfiguration().saveConfiguration(MZmineConfiguration.CONFIG_FILE);
    } catch (Exception e) {
      e.printStackTrace();
    }

    // Close all temporary files
    RawDataFile dataFiles[] = MZmineCore.getProjectManager().getCurrentProject().getDataFiles();
    for (RawDataFile dataFile : dataFiles) {
      dataFile.close();
    }

  }
}
